Longines Caliber 280

Brand	Longines
Caliber Number	280
Movement Type	Manual wind, mechanical
Diameter	11.75”’ (26.5mm)
Height	3.9mm
Lift Angle	50 degrees
Jewels	17
Power Reserve	42 hours
Vibrations Per Hour	19,800 bph
Anti-Shock System	Incabloc
Hands	1.60/12.0/0.13
Stem	6528
Balance	28910
Features	Hours, minutes, central seconds
Country of Manufacture	Switzerland
Production Years	1960’s
Known Models	Longines Sports Chief, other vintage Longines wristwatches. Please add yours to comments below…

The pictures posted here are of the caliber 280 found in a vintage Longines watch from 1961.

There are several variations of this caliber: the 280 pictured here; 281 with a date complication; 284 featuring an excenter regulator; and the 285 with a date and an excenter regulator. The mainspring of the caliber 280 is in a sealed unit.

You may have heard about the Longines RR280 which is a rare railroad grade chronometer. One of the distinguishing differences would be the swan neck regulator in the chronometer. The original railroad model had large Arabic numerals on the dial with “R.R. 280” at 6:00 (this watch was reissued in 2016 with a Longines caliber L888.2 aka ETA A31.L01).

Please share your experiences and thoughts about the caliber 280 in the comments section below…

Caliber submitted by wahawatches.com